> Also, I noticed that the concept of first paint/pixel is omitted in this
> draft. While IE supports it with a vendor prefix, and Chrome exposes it
> through their window.chrome.loadTimes() object (not sure if other browsers
> expose it), it would be good if it were included as part of the official
> spec so there was a browser-independent place to gather this data. Some
> 3rd-party testing vendors including webpagetest.org, report some concept
> of the time the browser began rendering the page, and I think it would be
> valuable here too.
+1 for exposing time to first paint in NavTiming!